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diff --git a/node/RemotePath.hpp b/node/RemotePath.hpp
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+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2015  ZeroTier, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+#ifndef ZT_REMOTEPATH_HPP
+#define ZT_REMOTEPATH_HPP
+
+#include <stdint.h>
+#include <string.h>
+
+#include <stdexcept>
+#include <algorithm>
+
+#include "Path.hpp"
+#include "Node.hpp"
+#include "AntiRecursion.hpp"
+#include "RuntimeEnvironment.hpp"
+
+namespace ZeroTier {
+
+/**
+ * Path to a remote peer
+ *
+ * This extends Path to include status information about path activity.
+ */
+class RemotePath : public Path
+{
+public:
+	RemotePath() :
+		Path(),
+		_lastSend(0),
+		_lastReceived(0),
+		_fixed(false) {}
+
+	RemotePath(const InetAddress &addr,bool fixed) :
+		Path(addr,0,TRUST_NORMAL,false),
+		_lastSend(0),
+		_lastReceived(0),
+		_fixed(fixed) {}
+
+	inline uint64_t lastSend() const throw() { return _lastSend; }
+	inline uint64_t lastReceived() const throw() { return _lastReceived; }
+
+	/**
+	 * @return Is this a fixed path?
+	 */
+	inline bool fixed() const throw() { return _fixed; }
+
+	/**
+	 * @param f New value of fixed flag
+	 */
+	inline void setFixed(const bool f)
+		throw()
+	{
+		_fixed = f;
+	}
+
+	/**
+	 * Called when a packet is sent to this remote path
+	 *
+	 * This is called automatically by RemotePath::send().
+	 *
+	 * @param t Time of send
+	 */
+	inline void sent(uint64_t t)
+		throw()
+	{
+		_lastSend = t;
+	}
+
+	/**
+	 * Called when a packet is received from this remote path
+	 *
+	 * @param t Time of receive
+	 */
+	inline void received(uint64_t t)
+		throw()
+	{
+		_lastReceived = t;
+	}
+
+	/**
+	 * @param now Current time
+	 * @return True if this path is fixed or has received data in last ACTIVITY_TIMEOUT ms
+	 */
+	inline bool active(uint64_t now) const
+		throw()
+	{
+		return ( (_fixed) || ((now - _lastReceived) < ZT_PEER_ACTIVITY_TIMEOUT) );
+	}
+
+	/**
+	 * Send a packet via this path
+	 *
+	 * @param RR Runtime environment
+	 * @param data Packet data
+	 * @param len Packet length
+	 * @param now Current time
+	 * @return True if transport reported success
+	 */
+	inline bool send(const RuntimeEnvironment *RR,const void *data,unsigned int len,uint64_t now)
+	{
+		if (RR->node->putPacket(_addr,data,len)) {
+			sent(now);
+			RR->antiRec->logOutgoingZT(data,len);
+			return true;
+		}
+		return false;
+	}
+
+private:
+	uint64_t _lastSend;
+	uint64_t _lastReceived;
+	bool _fixed;
+};
+
+} // namespace ZeroTier
+
+#endif